Combination drafting appliance.



No. 777,407. PATENTED DEC. 13, 1904.

E. J; EARLY.

COMBINATION DRAFTING APPLIANCE.

APPLICATION FILED FEB 4. 1904.

N0 MODEL.

fmJe Mow-j w/huifiwj 1 Earl? ,Earg

Patented December 13, 1904.

PATENT OFFICE.

COMBINATION lDRAFTING APPLIANCE.

iPEGIFIGATION forming part of Letters Patent N0. 777,407, dated December 13, 1904.

A lication filed February 4, 1904. Serial No. 191,916. (No model.)

To all whom, it puny concern.-

Be it known that I, EARL J. EARLY, a citizen of the United. States, rcsid ing at Philadelphia, in the county of Philadelphia and State of Pennsylwtnia, have invented certain new and useful Improvements in Combination Drafting Appliances, of which the following is a specification.

This invention relates to an appliance for use in instrumental drawing, and is designed to combine in one instrument (IOOPGItLlJlVG meansfor forming right lines, curves in connection therewith, either tangential or other wise, as desired, angles of fifteen degrees, thirty degrees, forty-live degrees, sixty degrees,seve1.ity-five degrees, and ninety degrees, together with guides for the correct formation of letters and numerals. For students, amateurs, or those of limited means and having limited use for instruments it will be of especial utility, as it will avoid the purchase and care of a multiplicity of instruments which have heretofore been necessary to use in doing that which can be done with this single instrument.

The invention is illustrated in the accompanying drawings, wherein similar parts are designated by similar characters of reference, in which Figure 1 is a view of one side of the instrument. Fig. 2 is a view of the opposite side of the instrument.

The general outline of the instrument is a triangle whose edges 1 2 3 form angles of forty-five degrees, sixty degrees, and seventylive degrees at their junctions. In order to provide for the formation of other angles which with those enumerated are the most in use, the body has an aperture 4: vertical to edge 3, with lines 5 6 in continuation of its edges to edge 3, which, with edge 3, form angles of ninety degrees, while from the opposite end of aperture 4 the line 5 runs to the apex of the forty-five-degree angle and combined with edge 1 forms an angle of fifteen degrees, while line 6 from the opposite side of the aperture extends to edge 2 and in conjunction therewith forms an angle of thirty degrees. Thus it will be seen that by the cooperative use ofedgcs 1 3, aperture 4, and its lines 5 angles fifteen degrees, seventy-five degrees, and ninety degrees are formed, while by the eoifiperative use of edges 2 3, aperture 4, and its lines 6 angles of thirty degrees, sixty degrees, and ninety degrees, making-in one instrument a triangle of forty-five degrees, sixty degrees, seventy-five degrees, another of fifteen degrees, seventy-five degrees, ninety degrees, and another of thirty degrees, sixty degrees, ninety degrees.

The instrument has an aperture 7 whose edge is composed of a variety of curves which may be used singly for mixed curved lines or in conjunction with edges 1 2 3 or the edges of aperture at for the formation of mixed right lines and curved lines either tangential or otherwise. The body of the triangle also has an aperture 8, whose edges 9 1O 11 12 13 14 15 16 may form the combined lines for letters and numerals in broad formation, and aperture 17, whose edges 11.819 20 21 22 23 24 25 may form the combined, lines for letters and numerals in medium-breadth formation, an aperture 526, whose edges 27 28 29 30 31 32 33 34 may form the combined lines for letters and numerals in narrow formation, so that by the combined and cooperative use of the various parts as set forth drawings with right lines, combined right and curved lines, angles, and. the letters and numerals descriptive thereof may by this single instrument be correctly formed.

I claim v 1. The combination in a drawing appliance, of a body of suitable material with edges which form aigles of forty-live degrees, sixty de grees and seventylive degrees; having an aperture ,t%hrough the body, vertical to one side, witldone of its edges in direct alinement with the vertex of the forty-five-degree angle and forming with the adjacent edge of the triangle an angle of fifteen degrees the opposite side of the opening with the triangles adjacent edge forming an angle of thirty degrees, and at its base each edge of the opening with the base edge of the triangle formingangles of ninety degrees the tri angle also having an aperture formed of composite curved lines.

2. The combination in a drawing appliance of a body of suitable material with edges which form three angles of different degrees; having an aperture through the body vertical to one of its edges, one edge of the aperture being in direct alinement with the vertex and an opposite parallel edge of the aperture which with the adjacent edges of the triangle form acute angles of difierent degrees from those formed by the triangles edges, and at its base with the adjacent edge of the triangle forming two right angles; the body also having multiple apertures by which the horizontal together with vertical lines of letters and numerals, and lines of different degrees of angularity for the same, may be drawn for their formation in broad, mediumbreadth or narrow designs.

3. The combination in a drawing appliance of a body of suitable material with edges which form three angles of different degrees, having an aperture vertical to one edge, one of its edges being in direct alinement with the vertex where the edges of the aperture and the triangles adjacent edges form acute angles of different degrees from those formed by the triangles edges and at the base of the aperture with the edge of the triangle as a base form right angles; also having an aperture whose edges form composite curved lines; also havingmultiple apertures by which the horizontal and vertical lines of letters and numerals, and lines of different degrees of angularity for the same may be drawn for their formation in broad, medium-breadth and narrow designs.

In testimony whereof I afiix my signature in presence of two witnesses.

EARL J. EARLY. \Vitnesses:

R. C. VRIGHT, l/VILLIAM G. Sronvnn. 

